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python-yield-http.py
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#coding:utf-8 | |
# http://stackoverflow.com/questions/2719017/how-to-set-timeout-on-pythons-socket-recv-method | |
# http://stackoverflow.com/questions/16745409/what-does-pythons-socket-recv-return-for-non-blocking-sockets-if-no-data-is-r | |
import select | |
import socket | |
def receive(s): | |
try: | |
s.settimeout(0) | |
data = s.recv(1024) | |
except socket.error, e: | |
# [Errno 11] Resource temporarily unavailable Linux | |
# [Errno 35] Resource temporarily unavailable Mac | |
if e.errno in (11, 35): | |
return | |
else: | |
print "socket error" | |
return "error" | |
else: | |
s.close() | |
return data | |
def download(host, port, file, worker): | |
print "{} start".format(worker) | |
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) | |
s.connect((host, port)) | |
s.send("GET %s HTTP/1.0\r\n\r\n" % (file,)) | |
while 1: | |
data = receive(s) | |
yield data, worker | |
threads = [] | |
def get(host, port, file, worker): | |
co = download(host, port, file, worker) | |
threads.append(co) | |
def dispatch(): | |
while 1: | |
i = 0 | |
while i < len(threads): | |
try: | |
data, worker = threads[i].next() | |
if data: | |
print data | |
print "{} done".format(worker) | |
threads.pop(i) | |
else: | |
i += 1 | |
except StopIteration: | |
threads.pop(i) | |
if len(threads) == 0: | |
return | |
if __name__ == "__main__": | |
import time | |
st = time.time() | |
for x in xrange(0, 10): | |
get("httpbin.org", 80 , "/delay/3", "worker {}".format( x ) ) | |
dispatch() | |
print "spend time:{}".format(time.time() - st) |
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